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TABLE 1C <br />ADDITIONAL CUMULATIVE GROUNDWATER MONITORING AND SAMPLING DATA - METALS <br />Former Mobil Service Station 99CAS <br />75 E. Alpine Avenue <br />Stockton, California <br />(Page 2 of 3) <br />Well <br />Sampling <br />Arsenic <br />Cadmium <br />Lead <br />Selenium Thallium Antimony <br />il) <br />Date <br />(lig,L) <br />(lig/L) <br />(pg/L) <br />(pg/L) WIL) (u L) <br />MW8 <br />06/28/07 - Present <br />Not analyzed for these analytes. <br />DW 1 <br />06/28/07 - Present <br />Not analyzed for these analytes. <br />MW3 <br />01/28/09 <br />17.9f <br /><5.00 <br />9.22 <br />4.45j -- --- <br />MW3 <br />04/29/09 <br />18.1 <br />0.212j <br />5.52 <br />1.15 -- --- <br />MW3 <br />07/14/09 <br />25.0 <br />0.645] <br />14.9 <br />0.784] - - <br />MW3 <br />10/28/09 <br />23.4 <br />0.796] <br />26.8 <br />1.00 w- --- <br />MW3 <br />01/25/10 <br />21.8 <br />0.889] <br />29.6 <br />0.795j --- --- <br />MW3 <br />04/07/10 <br />18.6 <br />2.06 <br />39.6 <br /><1.00 <br />MW3 <br />08/10/10 <br />30.2 <br />1.07 <br />29.7 <br /><1.00 <br />MW3 <br />10/06/10 <br />27.5 <br /><1.00 <br />15.9 <br /><1.00 <br />MW3 <br />02/09/11 <br />22.9 <br />0.612j <br />15.4 <br /><1.00 <br />MW3 <br />05/19/11 <br /><10.0 <br /><10.0 <br /><10.0 <br /><15.0 <br />MW4 <br />06/28/07 - Present <br />Not analyzed for these analytes. <br />MW5 <br />06/28/07 - Present <br />Not analyzed for these analytes. <br />MW6 <br />06/28/07 - Present <br />Not analyzed for these analytes. <br />MW7 <br />06/28/07 - Present <br />Not analyzed for these analytes. <br />MW8 <br />06/28/07 - Present <br />Not analyzed for these analytes. <br />DW 1 <br />06/28/07 - Present <br />Not analyzed for these analytes. <br />DW2 <br />06/28/07 - Present <br />Not analyzed for these analytes. <br />DW3 <br />06/28/07 - Present <br />Not analyzed for these analytes. <br />DW4 <br />06/28/07 - Present <br />Not analyzed for these analytes. <br />EX1 <br />06/28/07 - Present <br />Not analyzed for these analytes. <br />EX2 <br />06/28/07 - Present <br />Not analyzed for these analytes. <br />Notes: <br />TOC = Top of well casing elevation; datum is mean sea level. <br />DTW = Depth to water. <br />GW Elev. = Groundwater elevation; datum is mean sea level. <br />NAPL = Non -aqueous phase liquid. <br />TPHd = Total petroleum hydrocarbons as diesel analyzed using EPA Method 8015 (modified). <br />TPHg = Total petroleum hydrocarbons as gasoline analyzed using EPA Method 80156. Prior to 2002, analyzed using EPA Method 8015 (modified) <br />MTBE = Methyl tertiary butyl ether analyzed using EPA Method 82608. <br />